Christina Millian is selling shirts that quote Nicki Minaj's "Pretty On Fleek" line from "Feelin' Myself", which Nicki was apparently unaware of.

Pop culture references sell a lot of apparel these days, to the point that artists such as Taylor Swift, Beyonce, and Katy Perry have made a point of shutting down fan-made merch on Etsy and the like. Nicki Minaj is a highly quotable rapper, so when she works an uber-trendy word into one of her raps, chances are it'll end up on a t-shirt.

Minaj's "Pretty On Fleek" line from "Feelin' Myself" was the latest catchphrase to get the logo treatment, but rather than being co-opted by an amateur on Etsy, it's actually a fellow musician who's been marketing the merch.

Taking to Instagram, Nicki lightheartedly pointed out that Christina Millian was selling shirts with her lyrics on them, adding, "I was waitin on my percentage at the door! *tilts head*".

It wasn't long before Milan defended her choice, pointing to the many pop culture-influenced items on the market these days, but it seemed Minaj's qualms were minor, assuring that things were "all good" between the two when Milian expressed confusion over her remarks.

Check out the whole interaction below (Christina's Instagram reply can be viewed in the gallery above).